答案：A测试点：主语。分析：谓语动词helps为第三人称单数形式，说明

答案：A测试点：主语。分析：谓语动词helps为第三人称单数形式，说明复数的wooden buildings不是主语。应在答案中选择可作主语的名词性形式，即(A)或(C)。(C)不能后接名词词组wooden buildings；(A)为正确答案。解动名词作主语要求用单数谓语动词。

Kết quả (Anh) 1:

Answer: a test point: the subject. Analysis: third person singular form of the verb helps, that complex of wooden buildings is not subject. Should be selected in the answers may be used as subjects of the noun form, namely, (a) or (c). (C) cannot be followed by a noun phrase wooden buildings: (a) to the correct answer. Solutions of the gerund subject requires a singular verb.

Kết quả (Anh) 2:

Answer: A test point: the subject. Analysis: helps predicate verb third person singular form, indicating that the complex is not the subject of wooden buildings. Should be selected as the subject noun form of the answer, that is (A) or (C). (C) can not be followed by a noun phrase wooden buildings; (A) is the correct answer. Solutions gerund as subject requires a singular verb in use.

Kết quả (Anh) 3:

Answer: A test point: subject. Analysis: predicate verb helps as the third person singular form, the plural of buildings wooden is not the subject. In the answer, we should choose a noun form that can be used as the subject, namely (A) or (C). (C) can not be followed by the noun phrase buildings wooden; (A) for the correct answer. A singular predicate verb is used as the subject of a verb.